ETC 74F241N

INTEGRATED CIRCUITS
74F240/74F240A
Octal inverter buffer (3-State)
74F241/74F241A
Octal buffer (3-State)
Product specification
IC15 Data Handbook
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1991 Jan 02
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
FEATURES
DESCRIPTION
• Octal bus interface
• 3-State buffer outputs sink 64mA
• 15mA source current
• Guaranteed output skew less than 2.0ns
The 74F240 and 74F241 are octal buffers that are ideal for
driving bus lines of buffer memory address registers. The
outputs are all capable of sinking 64mA and sourcing up to
15mA. The device features two output enables, each
controlling four of the 3–state outputs.
(74F240A/74F241A)
• Reduced ground bounce (74F240A/74F241A)
The 74F240A and 74F241A are functionally equivalent to
their non–A counterparts. They have been designed to
reduce effects of ground noise. Other advantages are noted
in the features.
• Reduced ICC (74F241A only)
• Reduced loading (74F240A IIL = 100µA,
74F241A IIL = 40µA)
TYPE
TYPICAL PROPAGATION DELAY
TYPICAL SUPPLY CURRENT (TOTAL)
74F240
4.3ns
37mA
74F240A
3.8ns
40mA
74F241
5.0ns
53mA
74F241A
4.5ns
32mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
PKG DWG #
20–pin plastic DIP
N74F240N, N74F240AN, N74F241N, N74F241AN
SOT146-1
20–pin plastic SOL
N74F240D, N74F240AD, N74F241D, N74F241AD
SOT163-1
20-pin plastic SSOP II
N74F240DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Data inputs (74F240)
1.0/1.67
20µA/1.0mA
Data inputs (74F240A)
1.0/0.167
20µA/100µA
Data inputs (74F241)
1.0/2.67
20µA/1.6mA
Data inputs (74F241A)
1.0/0.067
20µA/40µA
PINS
Ian, Ibn
OEa, OEb
OEa, OEb
Yan, Ybn
DESCRIPTION
Output enable inputs (active low) (74F240)
1.0/0.33
20µA/0.2mA
Output enable inputs (active low) (74F240A)
1.0/0.167
20µA/100µA
Output enable input (74F241)
1.0/1.67
20µA/1.0mA
Output enable input (74F241A)
1.0/0.067
20µA/40µA
Data outputs (74F241, 74F241A)
750/106.7
15mA/64mA
750/106.7
15mA/64mA
Yan, Ybn
Data outputs (74F240, 74F240A)
Note to input and output loading and fan out table
One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state.
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853–0355 01345
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
PIN CONFIGURATION FOR 74F240/74F240A
IEC/IEEE SYMBOL FOR 74F240/74F240A
OEa
1
20 VCC
1
Ia0
2
19 OEb
19
Yb0
3
18 Ya0
Ia1
4
17 Ib0
2
Yb1
5
16 Ya1
4
16
6
14
8
12
6
Ia2
15 Ib1
Yb2
7
14 Ya2
Ia3
8
13 Ib2
EN1
EN2
2D
17
9
Yb3
5
11 Ib3
13
7
11
9
SF00320
SF00322
LOGIC SYMBOL FOR 74F240/74F240A
LOGIC DIAGRAM FOR 74F240/74F240A
2
4
6
8
17
15
13
11
Ia0
Ia0
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
Ia1
OEa
Ia2
19
3
2
15
12 Ya3
GND 10
1
18
1
2
18
4
16
6
14
8
12
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
17
3
15
5
13
7
11
9
Yb0
Yb1
Yb2
OEb
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
18
16
14
12
3
5
7
VCC = Pin 20
GND = Pin 10
Ia3
OEa
9
VCC = Pin 20
GND = Pin 10
SF00321
FUNCTION TABLE FOR 74F240/74F240A
INPUTS
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
L
L
H
H
L
H
L
H
L
L
H
X
H
X
Z
Z
Notes to function table for 74F240/74F240A
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance ”off” state
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1
OEb
Yb3
10
SF00323
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
PIN CONFIGURATION FOR 74F241/74F241A
OEa
20
1
VCC
1
19
Ia0
2
19
OEb
Yb0
3
18
Ya0
Ia1
4
17
Ib0
Yb1
16
5
IEC/IEEE SYMBOL FOR 74F241/74F241A
EN1
EN2
2
2D
18
1
4
16
6
14
8
12
Ya1
Ia2
6
15
Ib1
Yb2
7
14
Ya2
17
Ia3
8
13
Ib2
15
5
Yb3
9
12
Ya3
13
7
GND
10
11
Ib3
11
9
3
2
SF00326
SF00324
LOGIC SYMBOL FOR 74F241/74F241A
2
Ia0
1
OEa
19
OEb
4
6
Ia1 Ia2
8
17
Ia3 Ib0
15
13
11
Ib1 Ib2
Ib3
LOGIC DIAGRAM FOR 74F241/74F241A
Ia0
Ia1
Ia2
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
18
16
14
12
3
VCC = Pin 20
GND = Pin 10
5
7
Ia3
OEa
9
FUNCTION TABLE FOR 74F241/74F241A
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
H
L
L
L
L
H
H
H
H
H
H
X
L
X
Z
Z
Notes to function table for 74F241/74F241A
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance ”off” state
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18
4
16
6
14
8
12
1
VCC = Pin 20
GND = Pin 10
SF00325
INPUTS
2
4
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
OEb
17
3
15
5
13
7
11
9
Yb0
Yb1
Yb2
Yb3
10
SF00327
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the
operating free air temperature range.)
SYMBOL
PARAMETER
RATING
UNIT
VCC
Supply voltage
–0.5 to +7.0
V
VIN
Input voltage
–0.5 to +7.0
V
IIN
Input current
–30 to +5
mA
VOUT
Voltage applied to output in high output state
–0.5 to VCC
V
IOUT
Current applied to output in low output state
128
mA
Tamb
Operating free air temperature range
0 to +70
°C
Tstg
Storage temperature range
–65 to +150
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
MIN
NOM
MAX
VCC
Supply voltage
4.5
5.0
5.5
VIH
High–level input voltage
2.0
VIL
Low–level input voltage
0.8
V
IIk
Input clamp current
–18
mA
IOH
High–level output current
–15
mA
IOL
Low–level output current
64
mA
Tamb
Operating free air temperature range
+70
°C
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0
5
V
V
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST
LIMITS
CONDITIONS1
VCC = MIN,
VOH
±10%VC
TYP2
High-level output voltage
VIL = MAX,
IOH =
–15mA
VCC = MIN,
VIL = MAX,
Low-level output voltage
IOL = MAX
VIH = MIN,
VIK
Input clamp voltage
VCC = MIN, II = IIK
II
Input current at maximum input voltage
VCC = MAX, VI = 7.0V
IIH
High–level input current
2.4
V
VCC = MAX, VI = 2.7V
±5%VCC
2.7
±10%VC
2.0
V
2.0
V
3.4
±5%VCC
±10%VC
0.50
V
0.42
0.50
V
–0.73
-1.2
V
100
µA
C
±5%VCC
20
µA
–1.0
mA
–100
µA
–1.0
mA
74F241 Ian, Ibn
–1.6
mA
74F241A all inputs
–40
µA
74F240A all inputs
Low–level input current
V
C
74F240 all inputs
IIL
UNIT
MAX
C
VIH = MIN
VOL
IOH = –3mA
MIN
74F241 OEa, OEb
VCC = MAX, VI = 0.5V
IOZH
Off–state output current,
high–level voltage applied
VCC = MAX, VO = 2.7V
50
µA
IOZL
Off–state output current,
low–level voltage applied
VCC = MAX, VO = 0.5V
–50
µA
IOS
Short–circuit output current3
VCC = MAX
-225
mA
12
18
mA
50
70
mA
35
45
mA
ICCH
28
37
mA
ICCL
58
75
mA
ICCH
74F240
ICCL
ICCZ
74F240A
ICC
Supply current (total)
74F241
ICCZ
34
50
mA
ICCH
40
60
mA
ICCL
60
90
mA
ICCZ
74F241A
VCC = MAX
-100
65
90
mA
ICCH
VCC = MAX
20
30
mA
ICCL
49
65
mA
ICCZ
26
40
mA
Notes to DC electrical characteristics
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
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Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
AC ELECTRICAL CHARACTERISTICS
LIMITS
Tamb = +25°C
SYMBOL
PARAMETER
TEST
CONDITION
Tamb = 0°C to +70°C
VCC = +5.0V
CL = 50pF, RL = 500Ω
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
UNIT
MIN
TYP
MAX
MIN
MAX
Waveform 1
3.0
2.0
4.5
3.0
6.5
4.5
3.0
2.0
7.5
5.0
ns
Waveform 3
Waveform 4
3.0
4.5
5.0
6.5
7.5
8.5
3.0
4.0
9.0
10.0
ns
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
tPZH
tPZL
Output enable time
to high or low level
tPHZ
tPLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
3.0
3.0
5.5
5.0
7.0
7.0
3.0
3.0
7.5
7.5
ns
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
Waveform 1
2.5
2.0
4.0
3.5
5.5
5.5
2.0
2.0
6.5
6.0
ns
tPZH
tPZL
Output enable time
to high or low level
Waveform 3
Waveform 4
2.0
3.5
4.0
5.0
6.5
7.5
2.0
3.0
7.0
8.5
ns
tPHZ
tPLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
2.0
1.5
3.5
2.5
6.0
5.0
1.5
1.0
6.5
5.5
ns
tsk(0)
Output skew1, 2
Waveform 5
2.0
ns
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
Waveform 2
2.5
2.5
4.0
4.0
5.2
5.2
2.5
2.5
6.2
6.5
ns
tPZH
tPZL
Output enable time
to high or low level
Waveform 3
Waveform 4
2.0
2.0
4.0
5.0
5.7
7.0
2.0
2.0
6.7
8.0
ns
tPHZ
tPLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
2.0
2.0
4.0
4.0
6.0
6.0
2.0
2.0
7.0
7.0
ns
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
Waveform 2
2.5
2.5
4.5
4.5
5.8
5.8
2.5
2.5
6.5
6.5
ns
tPZH
tPZL
Output enable time
to high or low level
Waveform 3
Waveform 4
2.5
3.5
4.5
5.0
6.0
7.0
2.0
3.0
6.7
8.0
ns
tPHZ
tPLZ
Output disable time
from high or low level
Waveform 3
Waveform 4
2.0
1.5
4.0
3.5
6.0
5.5
1.5
1.0
6.5
6.0
ns
2.0
ns
74F240
74F240A
74F241
74F241A
1.5
tsk(0)
Output skew1, 2
Waveform 5
1.5
Notes to AC electrical characteristics
1. | tPN actual – tPM actual| for any output compared to any other output where N and M are either LH or HL.
2. Skew times are valid only under same test conditions (temperature, VCC, loading, etc.,).
AC WAVEFORMS
Ian, Ibn
VM
tPHL
Yn
Ian, Ibn
VM
Yn
VM
SF00328
tPHL
VM
VM
SF00329
Waveform 1. Propagation delay for inverting outputs
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VM
tPLH
tPLH
VM
VM
Waveform 2. Propagation delay for non–invertIng outputs
7
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
OEn
Yn, Yn
VM
VM
tPZH
tPHZ
VM
OEb
Yn, Yn
VOH -0.3V
tsk(0)
VM
Yn, Yn
0V
VM
SF00332
SF00330
Waveform 3. 3-state output enable time to high level
and output disable time from high level
Waveform 5. Output skew
Notes to AC waveforms
1. For all waveforms, VM = 1.5V.
2. The shaded areas indicate when the input is permitted to change
for predictable output performance.
OEn
VM
VM
OEb
tPZL
tPLZ
3.5V
VM
Yn, Yn
VOL +0.3V
SF00331
Waveform 4. 3-state output enable time to low level and output
disable time from low level
TEST CIRCUIT AND WAVEFORMS
VCC
7.0V
VIN
RL
VOUT
PULSE
GENERATOR
tw
90%
NEGATIVE
PULSE
VM
CL
AMP (V)
VM
10%
D.U.T.
RT
90%
10%
tTHL (tf )
tTLH (tr )
tTLH (tr )
tTHL (tf )
0V
RL
AMP (V)
90%
90%
Test Circuit for Open Collector Outputs
POSITIVE
PULSE
VM
VM
10%
TEST
tPLZ
tPZL
All other
SWITCH
closed
closed
open
DEFINITIONS:
RL = Load resistor;
see AC electrical characteristics for value.
CL = Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
RT = Termination resistance should be equal to ZOUT of
pulse generators.
10%
tw
SWITCH POSITION
0V
Input Pulse Definition
INPUT PULSE REQUIREMENTS
family
amplitude VM
74F
3.0V
1.5V
rep. rate
tw
tTLH
tTHL
1MHz
500ns
2.5ns
2.5ns
SF00128
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Philips Semiconductors
Product specification
74F240/74F240A
74F241/74F241A
Buffers
DIP20: plastic dual in-line package; 20 leads (300 mil)
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SOT146-1
Philips Semiconductors
Product specification
74F240/74F240A
74F241/74F241A
Buffers
SO20: plastic small outline package; 20 leads; body width 7.5 mm
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SOT163-1
Philips Semiconductors
Product specification
74F240/74F240A
74F241/74F241A
Buffers
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
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SOT339-1
Philips Semiconductors
Product specification
74F240/74F240A
74F241/74F241A
Buffers
Data sheet status
Data sheet
status
Product
status
Definition [1]
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
Product
specification
Production
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
 Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
print code
Document order number:
yyyy mmm dd
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Date of release: 10-98
9397-750-05101